#!/usr/bin/env bash
# ******************************************************
# Filename     : mariadb_auto_backup.sh
# Last modified: 2017-05-20 08:23
# Version      : 
# Author       : jack.zang
# Email        : jack.zang@aishangwei.net
# Description  : 第一次执行检查是否有完全备份，否则创建一个全库备份，
#                再次运行时，根据脚本设定来基于全备或增量进行增量备份。
# ******************************************************
 
# innobackex command name
INNOBACKUPEX_PATH=innobackupex  

# innobackupex path
#INNOBACKUPEXFULL=/usr/local/xtrabackup/bin/$INNOBACKUPEX_PATH  
INNOBACKUPEXFULL=/usr/bin/$INNOBACKUPEX_PATH 

# mysql server,user,password,port
MYSQL_CMD="--host=172.16.1.43 --user=testone --password=123456 --port=3306"    
MYSQL_UP=" --user=testone --password='123456' --port=3306 "  
TMPLOG="/tmp/innobackupex.$$.log"  

# mysql conf
#MY_CNF=/usr/local/mysql/my.cnf 
MY_CNF=/etc/my.cnf
MYSQL=/usr/bin/mysql  
MYSQL_ADMIN=/usr/bin/mysqladmin  

# mysql backup path
BACKUP_DIR=/backup  
# mysql backup full data library path
FULLBACKUP_DIR=$BACKUP_DIR/full 
# mysql backup increment data library ptah
INCRBACKUP_DIR=$BACKUP_DIR/incre   
# mysql backup date interval(s)
FULLBACKUP_INTERVAL=86400 
# mysql backup full data retain how mach version
KEEP_FULLBACKUP=1 
 
logfiledate=backup.`date +%Y%m%d%H%M`.txt  
 
#开始时间  
STARTED_TIME=`date +%s`  
 
 
#############################################################################  
 
# 显示错误并退出  
 
#############################################################################  
 
error()  
{  
    echo "$1" 1>&2  
    exit 1  
}  
 
   
# 检查执行环境  
if [ ! -x $INNOBACKUPEXFULL ]; then  
  error "$INNOBACKUPEXFULL未安装或未链接到/usr/bin."  
fi  
 
if [ ! -d $BACKUP_DIR ]; then  
  error "备份目标文件夹:$BACKUP_DIR不存在."  
fi  
 

# check mysql process 、user、password
mysql_status=`netstat -nl | awk 'NR>2{if ($4 ~ /.*:3306/) {print "Yes";exit 0}}'`  
 
if [ "$mysql_status" != "Yes" ];then  
    error "MySQL 没有启动运行."  
fi  
 
if ! `echo 'exit' | $MYSQL -s $MYSQL_CMD` ; then  
 error "提供的数据库用户名或密码不正确!"  
fi  
 
   
# 备份的头部信息   
echo "----------------------------"  
echo  
echo "$0: MySQL备份脚本"  
echo "开始于: `date +%F' '%T' '%w`"  
echo  
 
   
#新建全备和差异备份的目录  
mkdir -p $FULLBACKUP_DIR  
mkdir -p $INCRBACKUP_DIR  
  
#查找最新的完全备份  
LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`  
 
# 查找最近修改的最新备份时间  
LATEST_FULL_BACKUP_CREATED_TIME=`stat -c %Y $FULLBACKUP_DIR/$LATEST_FULL_BACKUP`  
  
#如果全备有效进行增量备份否则执行完全备份  
if [ "$LATEST_FULL_BACKUP" -a `expr $LATEST_FULL_BACKUP_CREATED_TIME + $FULLBACKUP_INTERVAL + 5` -ge $STARTED_TIME ] ; then  
    # 如果最新的全备未过期则以最新的全备文件名命名在增量备份目录下新建目录  
    echo -e "完全备份$LATEST_FULL_BACKUP未过期,将根据$LATEST_FULL_BACKUP名字作为增量备份基础目录名"  
    echo "                     "  
    NEW_INCRDIR=$INCRBACKUP_DIR/$LATEST_FULL_BACKUP  
    mkdir -p $NEW_INCRDIR  
 
    # 查找最新的增量备份是否存在.指定一个备份的路径作为增量备份的基础  
    LATEST_INCR_BACKUP=`find $NEW_INCRDIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"  | sort -nr | head -1`  
        if [ ! $LATEST_INCR_BACKUP ] ; then  
            INCRBASEDIR=$FULLBACKUP_DIR/$LATEST_FULL_BACKUP  
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"  
            echo "                     "  
        else  
            INCRBASEDIR=$INCRBACKUP_DIR/${LATEST_FULL_BACKUP}/${LATEST_INCR_BACKUP}  
            echo -e "增量备份将以$INCRBASEDIR作为备份基础目录"  
            echo "                     "  
        fi  
 
    echo "使用$INCRBASEDIR作为基础本次增量备份的基础目录."  
    $INNOBACKUPEXFULL --defaults-file=$MY_CNF --use-memory=4G $MYSQL_CMD --incremental $NEW_INCRDIR --incremental-basedir $INCRBASEDIR > $TMPLOG 2>&1  
 
    #保留一份备份的详细日志  
 
    cat $TMPLOG>/backup/$logfiledate  
 
    if [ -z "`tail -1 $TMPLOG | grep 'innobackupex: completed OK!'`" ] ; then  
     echo "$INNOBACKUPEX命令执行失败:"; echo  
     echo -e "---------- $INNOBACKUPEX_PATH错误 ----------"  
     cat $TMPLOG  
     rm -f $TMPLOG  
     exit 1  
    fi  
 
    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`  
    rm -f $TMPLOG  
 
 
    echo -n "数据库成功备份到:$THISBACKUP"  
    echo  
 
    # 提示应该保留的备份文件起点  
    LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`  
 
    NEW_INCRDIR=$INCRBACKUP_DIR/$LATEST_FULL_BACKUP  
 
    LATEST_INCR_BACKUP=`find $NEW_INCRDIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n"  | sort -nr | head -1`  
 
    RES_FULL_BACKUP=${FULLBACKUP_DIR}/${LATEST_FULL_BACKUP}  
 
    RES_INCRE_BACKUP=`dirname ${INCRBACKUP_DIR}/${LATEST_FULL_BACKUP}/${LATEST_INCR_BACKUP}`  
 
    echo  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo -e "必须保留$KEEP_FULLBACKUP份全备即全备${RES_FULL_BACKUP}和${RES_INCRE_BACKUP}目录中所有增量备份."  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo  
 
 
 
else  
    echo  "*********************************"  
    echo -e "正在执行全新的完全备份...请稍等..."  
    echo  "*********************************"  
    $INNOBACKUPEXFULL --defaults-file=$MY_CNF  --use-memory=4G  $MYSQL_CMD $FULLBACKUP_DIR > $TMPLOG 2>&1  
    #保留一份备份的详细日志  
    cat $TMPLOG>/backup/$logfiledate  
  
    if [ -z "`tail -1 $TMPLOG | grep 'innobackupex: completed OK!'`" ] ; then  
     echo "$INNOBACKUPEX命令执行失败:"; echo  
     echo -e "---------- $INNOBACKUPEX_PATH错误 ----------"  
     cat $TMPLOG  
     rm -f $TMPLOG  
     exit 1  
    fi  
       
    THISBACKUP=`awk -- "/Backup created in directory/ { split( \\\$0, p, \"'\" ) ; print p[2] }" $TMPLOG`  
    rm -f $TMPLOG  
 
    echo -n "数据库成功备份到:$THISBACKUP"  
    echo  
 
    # 提示应该保留的备份文件起点  
    LATEST_FULL_BACKUP=`find $FULLBACKUP_DIR -mindepth 1 -maxdepth 1 -type d -printf "%P\n" | sort -nr | head -1`  
 
    RES_FULL_BACKUP=${FULLBACKUP_DIR}/${LATEST_FULL_BACKUP}  
 
    echo  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo -e "无增量备份,必须保留$KEEP_FULLBACKUP份全备即全备${RES_FULL_BACKUP}."  
    echo -e '\e[31m NOTE:---------------------------------------------------------------------------------.\e[m' #红色  
    echo  
 
fi  
 
 
#删除过期的全备  
 
echo -e "find expire backup file...........waiting........."  
echo -e "寻找过期的全备文件并删除">>/backup/$logfiledate  
for efile in $(/usr/bin/find $FULLBACKUP_DIR/ -mtime +6)  
do  
    if [ -d ${efile} ]; then  
    rm -rf "${efile}"  
    echo -e "删除过期全备文件:${efile}" >>/backup/$logfiledate  
    elif [ -f ${efile} ]; then  
    rm -rf "${efile}"  
    echo -e "删除过期全备文件:${efile}" >>/backup/$logfiledate  
    fi;  
     
done  
 
if [ $? -eq "0" ];then  
   echo  
   echo -e "未找到可以删除的过期全备文件"  
fi  
 
 
 
echo  
echo "完成于: `date +%F' '%T' '%w`"  
exit 0  
